.w {
    color: black;
    width: 80%;
    margin: 0 auto;
}

table {
    width: 100%;
    border: 1;
    /* background-color: rgb(226, 226, 226); */
}

.container_div>p {
    padding-top: 50px;
    margin-bottom: 50px;
    font-size: 30px;
    color: white;
    text-align: center;
    /* color: black; */
}

.select {
    width: 50%;
    float: left;
    margin-bottom: 50px;
    margin-left: 20%;
    /* margin-left: 9%; */
    /* background-color: #584F4A; */
}

.select span {
    display: inline-block;
    font-size: 14px;
    color: white;
}

.select span:nth-child(4) {
    margin-top: 10px;
}

.select select {
    height: 30px;
    background-color: rgba(109, 96, 88, .5);
    color: white;
}

td {
    /* color: white; */
    height: 40px;
    line-height: 40px;
    text-align: center;
    cursor: pointer;
}


/* btn部分 */

.btn-list {
    /* width: 40%; */
    height: auto;
    float: left;
    /* margin-bottom: 50px; */
}

.btn {
    margin-left: 50px;
    margin-top: 20px;
}

td>span {
    margin-left: 10px;
}


/* 模态框-添加班级 */

.modai1,
.modai2 {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.445);
    display: none;
}

.modai-content {
    width: 50%;
    height: 400px;
    margin: 150px auto;
    background-color: white;
    position: relative;
}

.close {
    position: absolute;
    top: 12px;
    right: 5px;
    width: 40px;
    height: 40px;
    border-radius: 20px;
    cursor: pointer;
    color: white;
}

.modai-content>h2 {
    color: white;
    width: 100%;
    height: 50px;
    line-height: 50px;
    text-align: center;
    /* background-color: #584F4A; */
}

form {
    margin: 50px auto;
}

.div2 {
    width: 100%;
    height: 50px;
    margin-top: 100px;
    text-align: center;
    /* background-color: rgb(6, 243, 243); */
}

.btn1,
.btn2 {
    width: 150px;
    border-radius: 5px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: #5b6874;
}

.btn1:hover {
    color: white;
    background-color: #5b6874;
}

.btn2:hover {
    color: white;
    background-color: #5b6874;
}

#btn5 {
    background-color: #584F4A;
}

#btn6 {
    margin-top: 40px;
}

#btn6,
#btn3 {
    color: white;
    background-color: #584F4A;
}

#btn6,
#btn3:hover {
    background-color: #5b6874;
}


/* 分页部分 */

#divPage {
    /* position: absolute; */
    width: 25%;
    height: 40px;
    margin: 0 auto;
    /* padding-bottom: 400px; */
    /* border: 1px solid red; */
}

#divPage>button {
    display: inline-block;
    width: 45%;
    margin-left: 5px;
    height: 40px;
    line-height: 40px;
    border-radius: 5px;
}

#divPage>button:hover {
    background-color: rgb(163, 162, 162);
}


/* 添加模态框 */

.add {
    width: 500px !important;
    padding: 30px 50px 0;
}

.add p {
    text-align: center;
    font-size: 18px;
    color: black;
}

.add label {
    font-size: 14px;
}

.add input {
    height: 30px;
}

.add .addclass {
    margin-top: 10px;
}


/* 修改模态框 */

.upda {
    width: 500px !important;
    padding: 30px 50px 0;
}

.upda p {
    text-align: center;
    font-size: 18px;
    color: black;
}

.upda label {
    font-size: 14px;
}

.upda input {
    height: 30px;
}

.upda .updaclass {
    margin-top: 10px;
}